气候变化领域集成服务门户(CCPortal): Crustal Structure of the UAE-Oman Mountain Range and Arabian Rifted Passive Margin: New Constraints From Active and Passive Seismic Methods

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DOI	10.1029/2020JB021374
	Crustal Structure of the UAE-Oman Mountain Range and Arabian Rifted Passive Margin: New Constraints From Active and Passive Seismic Methods
	Pilia S.; Ali M.Y.; Searle M.P.; Watts A.B.; Lü C.; Thompson D.A.
发表日期	2021
ISSN	21699313
卷号	126 期号:4
英文摘要	The Semail ophiolite, a thick thrust sheet of Late Cretaceous oceanic crust and upper mantle, was obducted onto the previously rifted Arabian continental margin in the Late Cretaceous, and now forms part of the United Arab Emirates (UAE)-Oman mountain belt. A deep foreland basin along the west and SW margin of the mountains developed during the obduction process, as a result of flexure due to loading of the ophiolite and underlying thrust sheets. The nature of the crust beneath the deep sedimentary basins that flank the mountain belt, and the extent to which the Arabian continental crust has thickened due to the obduction process are outstanding questions. We use a combination of active- and passive-source seismic data to constrain the stratigraphy, velocity structure and crustal thickness beneath the UAE-Oman mountains and its bounding basins. Depth-migrated multichannel seismic reflection profile data are integrated in the modeling of traveltimes from long offset reflections and refractions, which are used to resolve the crustal thickness and velocity structure along two E-W onshore/offshore transects in the UAE. Additionally, we apply the virtual deep seismic sounding method to distant earthquake data recorded along the two transects to image crustal thickness variations. Active seismic methods define the Semail ophiolite as a high-velocity body dipping to the east at 40°–45°. The new crustal thickness model presented in this work provides evidence that a crustal root is present beneath the Semail ophiolite, suggesting that folding and thrusting during the obduction process may have thickened the pre-existing crust by 16 km. © 2021. The Authors.
英文关键词	crustal thickness; flexure; obduction; sedimentary basins; semail ophiolite; virtual deep seismic sounding
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187212
作者单位	Department of Earth Sciences-Bullard Labs, University of Cambridge, Cambridge, United Kingdom; Department of Earth Sciences, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates; Department of Earth Sciences, University of Oxford, Oxford, United Kingdom; School of Earth and Ocean Sciences, Cardiff University, Cardiff, United Kingdom; Now at Omanos Analytics, Glasgow, United Kingdom
推荐引用方式 GB/T 7714	Pilia S.,Ali M.Y.,Searle M.P.,et al. Crustal Structure of the UAE-Oman Mountain Range and Arabian Rifted Passive Margin: New Constraints From Active and Passive Seismic Methods[J],2021,126(4).
APA	Pilia S.,Ali M.Y.,Searle M.P.,Watts A.B.,Lü C.,&Thompson D.A..(2021).Crustal Structure of the UAE-Oman Mountain Range and Arabian Rifted Passive Margin: New Constraints From Active and Passive Seismic Methods.Journal of Geophysical Research: Solid Earth,126(4).
MLA	Pilia S.,et al."Crustal Structure of the UAE-Oman Mountain Range and Arabian Rifted Passive Margin: New Constraints From Active and Passive Seismic Methods".Journal of Geophysical Research: Solid Earth 126.4(2021).